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Re: [OM] 50mm versions?

Subject: Re: [OM] 50mm versions?
From: "Giles" <cnocbui@xxxxxxxxxxxxx>
Date: Thu, 12 Feb 1998 22:49:27 +8
You use your 50mm f1.8 SC and I will struggle on with my 50mm f1.2 
MC.

Individuality is wonderful

Giles

> Hi Giles and Lars and others:
> 
> Draw a 24 x 36 mm box, place points on the longest diagonal at 7, 14 and 21.5
> mm in both directions from the center, draw perfect circles around paired
> points, then evaluate the area within the circles.  While everyone's subject
> matter differs, I'd argue mathematically that the 1/3 out and 2/3rds out
> "zones" (essentially the area from 3.5 to 17.5 mm off center) is the most
> critical area (i.e., it is what you see the most of in my typical pictures =
> landscapes).  If a lens is stellar in the center and drops off with each
> successive zone going outwards, you are wasting the center performance on very
> little total area.  It the corners are high in relation to everything else,
> you are wasting it on minor area in the four corners of the frame.
> 
> I can't know what was in the mind of Yoshisada Hayamizu and his team of OLY
> lens designers, but I would speculate that published lens test results
> influenced lens design changes in the 50 mm f/1.8 (as well as cost reduction
> and the related price/performance increases).  As a software beta tester I've
> noted how the software designers are very cognizant of published reviews and
> perceived shortcomings of their product.  If the reviews say it doesn't work
> like a competing Microsoft product, then the product seems to get changed to
> mimic the Microsoft look and feel, whether or not the original design was
> functionally superior.  Just think back on how every new OLY model had a lens
> test on its normal lens.  It behoved Olympus to get the prime lens "right"
> (based on market perception!) or the model might be written off on lens
> performance alone.
> 
> In a previous move, I threw out all my files on OLY stuff: test reports,
> product literature, the works.  (Yup, I regret it now).  Yet, I worked with my
> lenses long enough to know them and I've long felt the original chrome ring
> non-MC 50 mm f/1.8 put the performance spike were it was most needed my me:
> 1/3 to 2/3rds out.  (P.S., I've used more than one sample).  So for me the
> evolution to more eveness in performance across the field wasn't an
> improvement, although some  pictures can benefit from it.  That is when the 50
> mm f/2.0 macro comes out - assuming I'm carrying it.
> 
> Gary (loves choices) Reese
> Las Vegas, NV

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